A thug who was jailed for torturing his girlfriend for 10 hours and threatened to pour boiling water on her, was left badly burned in a horrific “napalm” attack by a fellow prisoner who had once plotted to kill murderer Peter Tobin.

In this latest attack last July he poured a mixture of boiling water and sugar over Laverty leaving him with burns to his face, neck and chest.

Boath had been caught on CCTV heading to his target's cell clutching a kettle. A naked Laverty was then seen racing out seconds later, screaming in agony.

Serial criminal Boath, who has previously been held in solitary confinement for bullying fellow cons and taking their prescription medicines, today returned to the High Court in Glasgow where he admitted attacking Laverty to his severe injury.

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He has previously attacked other prisoners, targeting sex offenders in particular and came within three hours of murdering serial killer Tobin three years ago. Tobin is currently serving consecutive life sentences for three murders committed between 1991 and 2006.

Lord Burns today sentenced Boath to four years for the attack on Clackmannanshire thug Laverty who, while attacking his partner at their home in 2015 told her: “How would you feel if I put boiling water over you?”

Henry Laverty (Image: Police Scotland)

Boath has now been locked up over 30 times. This latest jail-term will only begin after the thug serves a seven year stint for assault, abduction and robbery. He will also be monitored for a further three years whenever he is freed.

The attack occurred in July last year while Boath and Laverty were in Shotts and the latter was serving a five year sentence.

The hearing was told there had allegedly been a previous incident between the pair.

Guards were alerted to the 'napalm' attack when they heard “screaming” in one of the halls.